(Topic ID: 204297)

Gottlieb Grand Slam project

By Sodacrack

3 years ago



Topic Stats

  • 9 posts
  • 4 Pinsiders participating
  • Latest reply 3 years ago by Sodacrack
  • Topic is favorited by 1 Pinsider

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#1 3 years ago

I recently picked up a 1972 Grand Slam Project. It needs a bunch of work, but is worth bringing back to life. While cleaning the contacts, I noticed a wire is disconnected from a contact on the score motor. Can someone verify which contact I should connect it to? I think it is the one on the far right in the photo. I currently do not have schematics

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#2 3 years ago

It's probably a wire that shares a switch lug with another wire. Look for a switch lug that has bright solder, which might show a broken, shared solder joint. Also, other Gottlieb machines of the same era might use the same wiring color for the score motor switches. So, using other available schematics might help with the wire location...

#3 3 years ago
Quoted from fredsmythson:

It's probably a wire that shares a switch lug with another wire. Look for a switch lug that has bright solder, which might show a broken, shared solder joint. Also, other Gottlieb machines of the same era might use the same wiring color for the score motor switches. So, using other available schematics might help with the wire location...

Sorry, fredsmythson I normally agree with your advice but looks like there's a first time for everything. Soldering this wire to another one without understanding why is risky at best.

#4 3 years ago

Thanks for pointing this out, HowardR. I don't think I said to randomly solder a wire to another wire. I was just saying to look for clues to where the wire might have disconnected. I should have explained this better in the previous post. Sometimes a wire can get disconnected and it will leave a solder indentation, which might match up to the wire that became disconnected... But, the best way to troubleshoot this would be with the machine's schematic. Hopefully, someone will post information about the Grand Slam schematic...

#5 3 years ago

Thanks for clarifying, fredsmythson

#6 3 years ago
Quoted from fredsmythson:

It's probably a wire that shares a switch lug with another wire. Look for a switch lug that has bright solder, which might show a broken, shared solder joint. Also, other Gottlieb machines of the same era might use the same wiring color for the score motor switches. So, using other available schematics might help with the wire location...

I have looked at the switch lugs to help indicate where it was disconnected, but it is not clear.

#7 3 years ago
Quoted from Sodacrack:

I have looked at the switch lugs to help indicate where it was disconnected, but it is not clear.

Is the game functional/playing? If we knew what was broke you can then find the lead on the diagram. or somebody that has this game.

#8 3 years ago
Quoted from pinhead52:

Is the game functional/playing? If we knew what was broke you can then find the lead on the diagram. or somebody that has this game.

Yes

#9 3 years ago
Quoted from pinhead52:

Is the game functional/playing? If we knew what was broke you can then find the lead on the diagram. or somebody that has this game.

I am still checking and cleaning contacts and steppers. It has been sitting in a warehouse for about 20 years and everything needs to be gone through. I should be able to try a start up this weekend

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